五(1)班有45名学生,其中女生有28名,女生占全班人数的几分之几?
28÷45=2845,
答:女生占全班人数的2845.
观察鲫鱼在水中的游动,其快速向前游动主要是依靠( )
A.背鳍
B.胸鳍
C.尾部肌肉和尾鳍
D.腹鳍和臀鳍
I’m thirsty. Can I have _____ , Miss Green ? [ ]
A. cold something
B. to drink
C. cold something to drink
D. something cold to drink